solubility study of polyacrylamide in polar solvents

Solubility study of polyacrylamide in polar solvents

Contact angles and surface tension data were measured to obtain the surface tension components of polyacrylamide (PAM). According to Van Oss, Chaudhury, and Good (VCG) theory, the surface tension components were used to calculate the PAM solubility in five different polar solvents: water, ethylene glycol (EG), acetone, ethanol, and dimethyl formamide (DMF).

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solubility study of polyacrylamide in polar solvents

Solubility study of polyacrylamide in polar solvents

Solubility study of polyacrylamide in polar solvents

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solubility study of polyacrylamide in polar solvents

Solubility study of polyacrylamide in polar solvents

Solubility study of polyacrylamide in polar solvents Article in Journal of Applied Polymer Science 93(3):1493 - 1499 · August 2004 with 2,825 Reads How we measure 'reads'

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solubility study of polyacrylamide in polar solvents - core

Solubility Study of Polyacrylamide in Polar Solvents - CORE

Abstract. Contact angles and surface tension data were measured to obtain the surface tension components of polyacrylamide (PAM). According to Van Oss, Chaudhury, and Good (VCG) theory, the surface tension components were used to calculate the PAM solubility in five different polar solvents: water, ethylene glycol (EG), acetone, ethanol, and dimethyl formamide (DMF).

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predicting cosolvency. 1. solubility ratio and solute log

Predicting Cosolvency. 1. Solubility Ratio and Solute log

Solubility study of polyacrylamide in polar solvents. Journal of Applied Polymer Science 2004, 93 (3) , 1493-1499. DOI: 10.1002/app.20608. Henry X. Corseuil, Beatriz I.A. Kaipper, Marilda Fernandes. Cosolvency effect in subsurface systems contaminated with petroleum hydrocarbons and ethanol.

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the solubility of polyacrylonitrile | springerlink

The Solubility of Polyacrylonitrile | SpringerLink

The comparative study of the thermodynamic solubility of PAN in five solvents led to the following conclusions: the thermodynamic solubility of PAN, characterized by the experimental and calculated cloud point curves, differ significantly for two kinds of solvents: organic aprotic and inorganic aqueous solution of NaSCN; the solubility of PAN in an aqueous solution of NaSCN is much higher than

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structure and properties of dna in apolar solvents | the

Structure and Properties of DNA in Apolar Solvents | The

The study of nucleic acids in low-polarity environments paves the way for novel biotechnological applications of DNA. Here, we use a repertoire of atomistic molecular simulation tools to study the nature of DNA when placed in a highly apolar environment and when transferred from aqueous to apolar solvent. Our results show that DNA becomes stiffer in apolar solvents and suggest that highly

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predicting cosolvency. 1. solubility ratio and solute log

Predicting Cosolvency. 1. Solubility Ratio and Solute log

The solubility ratio of organic chemicals in an organic solvent and in water, σ, has been found to correlate with the logarithm of the octanol−water partition coefficient (log Kow) of the solutes; i.e., log σ = N + M log Kow. A total of 607 sets of thousands of solubility data were extracted from literature sources. From this database, values of N and M are obtained for 15 completely water

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water soluble polymers for pharmaceutical applications

Water Soluble Polymers for Pharmaceutical Applications

Advances in polymer science have led to the development of novel drug delivery systems. Some polymers are obtained from natural resources and then chemically modified for various applications, while others are chemically synthesized and used. A large number of natural and synthetic polymers are available. In the present paper, only water soluble polymers are described.

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application of hydrophobically modified water‐soluble

Application of hydrophobically modified water‐soluble

In polar solvents, these molecules may associate into micelle‐like structures with hydrophobes as the core while the hydrophiles extend into the corona phase, and vice versa for the nonpolar solvents. 33 This behavior implicates that PAAm‐g‐PEO‐PPO copolymer surfactant tends to the micelle formation, and also the micelle inversion

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frontiers | advances in organic solvent nanofiltration

Frontiers | Advances in Organic Solvent Nanofiltration

The vast majority of industrial chemical synthesis occurs in organic solution. Solute concentration and solvent recovery consume ~50% of the energy required to produce chemicals and pose problems that are as relevant as the synthesis process itself. Separation and purification processes often involve a phase change and, as such, they are highly energy-intensive.

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synthesis and characterization of poly(styrene-co

Synthesis and Characterization of Poly(styrene-co

Electrospun nanofibers present a new and rapidly growing research area due to their pronounced micro and nano characteristics associated with high surface area to volume ratio. Poly(styrene-co-acrylamide) and polystyrene polymers were synthesized by boiling temperature soap free emulsion polymerization in aqueous medium with potassium peroxosulphate as the initiator.

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equilibrium swelling and solvation studies on - deepdyve

Equilibrium swelling and solvation studies on - DeepDyve

Polyacrylamide (PA) crosslinked with four different crosslinking agents, triethyleneglycol dimethacrylate (TEGDMA), N,N′‐methylene bisacrylamide (NNMBA), hexanediol dimethacrylate (HDDMA) and divinylbenzene (DVB), with mole percents ranging from 5 to 20, was prepared by solution polymerization and subjected to swelling and solvation studies. Solubility parameters and cohesive energy

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chinese journal of chemical engineering

Chinese Journal of Chemical Engineering

The solubility of NH_3 in water in multicomponent systems under high pressure is of extreme importance to the new integrated ammonia and urea process. This paper proposes a new method for calculating the vaporliquid equilibria for aqueous ammonia solutions under high pressure.

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purification and characterization of an extracellular

Purification and characterization of an extracellular

Halotolerant bacteria are excellent sources for selecting novel enzymes. Being intrinsically stable and active under high salinities, enzymes from these prokaryotes have evolved to function optimally under extreme conditions, making them robust biocatalysts with potential applications in harsh industrial processes. A halotolerant strain LY19 showing lipolytic activity was isolated from saline

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solvent selection for whole cell biotransformations in

SOLVENT SELECTION FOR WHOLE CELL BIOTRANSFORMATIONS IN

against solvents in a study carried out by Brink and Tramper (1985), while Ceen et al (1987) reported that the protection conferred via calcium alginate immobilisation was only modest for polar solvents. In addition, mass­transfer has also been identified as a

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bulletin of the chemical society of japan: vol 39, no 1

Bulletin of the Chemical Society of Japan: Vol 39, No 1

In polar solvents, both the formation of CH 2 O and the polymerization were retarded as the water concentration increased. In these systems the concentration of the CH 2 O formed changed with time, and no equilibrium or stationary concentration was recognized. In the case of the boron fluoride catalyst, an increase in the water concentration

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a cationic polyacrylamide dispersion synthesis

A cationic polyacrylamide dispersion synthesis

Full Article. A CATIONIC POLYACRYLAMIDE DISPERSION SYNTHESIS BY DISPERSION POLYMERIZATION IN AQUEOUS SOLUTION. Yufeng Wang, a,b, * Kefu Chen, a Lihuan Mo, a,* and Huiren Hu c A cationic polyacrylamide (CPAM) dispersion, the copolymer of acrylamide (AM) and acryloyloxyethyltrimethyl ammonium chloride (DAC), has been synthesized through dispersion polymerization in aqueous ammonium sulfate ((NH

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application of hydrophobically modified water‐soluble

Application of hydrophobically modified water‐soluble

In polar solvents, these molecules may associate into micelle‐like structures with hydrophobes as the core while the hydrophiles extend into the corona phase, and vice versa for the nonpolar solvents. 33 This behavior implicates that PAAm‐g‐PEO‐PPO copolymer surfactant tends to the micelle formation, and also the micelle inversion

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高分子学报 - gfzxb.org

高分子学报 - gfzxb.org

Abstract: Acrylonitrile(AN) homopolymerization and the copolymerization were examined under various conditions in the presence of anhydrous magnesium chloride (MgCl2).The polymers were obtained with high isotacticity.The effect of solvents,reaction temperature,the molar ratio of MgCl2 and AN on AN homopolymerization and the copolymerization and the tacticity of the polymers were investigated

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equilibrium swelling and solvation studies on - deepdyve

Equilibrium swelling and solvation studies on - DeepDyve

Polyacrylamide (PA) crosslinked with four different crosslinking agents, triethyleneglycol dimethacrylate (TEGDMA), N,N′‐methylene bisacrylamide (NNMBA), hexanediol dimethacrylate (HDDMA) and divinylbenzene (DVB), with mole percents ranging from 5 to 20, was prepared by solution polymerization and subjected to swelling and solvation studies. Solubility parameters and cohesive energy

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us20140187451a1 - producing nanostructure of polymeric

US20140187451A1 - Producing Nanostructure of Polymeric

Hydrophilic polymer particles have been obtained using polyacrylamide, xanthane, maleic anhydride polymers, allylamine, ethyleneimine, and oxazoline as core polymers. Then, hydrophobic polymers shells have been produced on the core-side using styrene, styrene copolymers, polyvinyl state, polysolfune, polymethyl methacrylate, and polycyclohxyl methacrylate by in-situ polymerization of monomer

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chemistry of lignin-based materials | green materials

Chemistry of lignin-based materials | Green Materials

Fossil fuel–based polymeric materials, typified by most thermosets and thermoplastics, have become an important part of modern society. The current production of all polymers in the United States alone was 102·8 billion pounds during 2010. 1 These commonly used polymers, however, have problems. The first problem is the trend toward relying on nontraditional sources of petroleum, such as tar

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acta physico-chimica sinica - pku

Acta Physico-Chimica Sinica - PKU

We studied the effect of Pluronic F127 micelle solution on the solubility of ibuprofen (IBU). The critical micelle concentration (cmc) of F127 in both water and 0.01 mol·L-1 pH 7.4 phosphate buffer salt (PBS) solution at different temperatures was determined by the pyrene fluorescence method. The concentration of the solubilized IBU was determined using high-performance liquid chromatography

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bulletin of the chemical society of japan: vol 39, no 1

Bulletin of the Chemical Society of Japan: Vol 39, No 1

In polar solvents, both the formation of CH 2 O and the polymerization were retarded as the water concentration increased. In these systems the concentration of the CH 2 O formed changed with time, and no equilibrium or stationary concentration was recognized. In the case of the boron fluoride catalyst, an increase in the water concentration

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高分子学报 - gfzxb.org

高分子学报 - gfzxb.org

Abstract: The degree of ionization of polyacrylic acid and pure sodium polyacrylate solutions covering a wide concentration range was deteremined by measuring the pH values of these solutions. The results show that the degrees of ionization are very sensitve to the location of the concentration range of polyelectrolyte solutions.The concept of dynamic contact concentration proposed by Qian

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acta physico-chimica sinica - pku

Acta Physico-Chimica Sinica - PKU

We studied the effect of Pluronic F127 micelle solution on the solubility of ibuprofen (IBU). The critical micelle concentration (cmc) of F127 in both water and 0.01 mol·L-1 pH 7.4 phosphate buffer salt (PBS) solution at different temperatures was determined by the pyrene fluorescence method. The concentration of the solubilized IBU was determined using high-performance liquid chromatography

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synthesis of sharply thermo and ph responsive pma-b-pnipam

Synthesis of sharply thermo and PH responsive PMA-b-PNIPAM

acidic monomers and also the use of polar solvents such as ethanol [56]. In the present study, a combination of PNIPAM, PMA, and PEG in an ABCBA pentablock terpolymer, PMA-b-PNIPAM-b-PEG-b-PNIPAM-b-PMA was synthesized using RAFT polymerization to yield controlled and narrow molecular weight distributions. The pH- and thermo-

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purification and characterization of an extracellular

Purification and characterization of an extracellular

Halotolerant bacteria are excellent sources for selecting novel enzymes. Being intrinsically stable and active under high salinities, enzymes from these prokaryotes have evolved to function optimally under extreme conditions, making them robust biocatalysts with potential applications in harsh industrial processes. A halotolerant strain LY19 showing lipolytic activity was isolated from saline

Get Price
chemistry of lignin-based materials | green materials

Chemistry of lignin-based materials | Green Materials

Fossil fuel–based polymeric materials, typified by most thermosets and thermoplastics, have become an important part of modern society. The current production of all polymers in the United States alone was 102·8 billion pounds during 2010. 1 These commonly used polymers, however, have problems. The first problem is the trend toward relying on nontraditional sources of petroleum, such as tar

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polarographic and spectrophotometric study of lead

Polarographic and Spectrophotometric Study of Lead

In our recent study 13 the lead(II)-ADEDC system was evaluated by potentiometric experiments using a lead electrode for the determination of solubility and stepwise constants. In the present work these same complexes have been examined in more detail and very good agreement has been found between the values determined in this work with the 13

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the degradation behavior of silk fibroin derived

The degradation behavior of silk fibroin derived

Establishing an appropriate degradation rate is critical for tissue engineering scaffolds. In this study, the degradation rate of silk fibroin three-dimensional scaffolds was regulated by changing the molecular weight (MW) of the silk fibroin. The solubility of silk fibroin depends primarily on the ionic ability of the slovent to dissolve silk fibroin, therefore, we regulated the MW of the

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